Pulverizing machine



July e, 1926. I I 1,591,283

E. CHARTON ET AL PULVERIZING MACHINE Filed Nov 26, 1925 6 -infirm 2 Sheets-Sheet 1 July 6, 1926. 1,591,283

E. CHARTON ET AL PULVERIZING MACHINE Nov. 26, 1923 2' Sheets-Sheet 2 Patented July 6, 1926. v v UNITED STATES v H 1,591,283 PATENT OFFICE.

nmuonn cnan'ron AND rmimn MAURICE monennnau, or rams, FRANCE."

PULVERIZINQ MACHINE.

Application filed November 26, 1923, Serial No. 676,894, and-in Belgium October 25, 1928.

This invention relates to pulverizing machines and has for its principal object so to construct such machines that they respond more fully to practical requirements than has hitherto been the case.

The machine is of the type in which the fragments to be broken or disintegrated and 1 bers, each of which is provided around its periphery with vanes, so that each of these Where members acts as .a centrifugal fan. a plurality of these members is provided, the

various members are arranged -concentrically and are rotated alternately in opposite di-.

rections.

A beater provided withblades which also constitutes a fan or ventilator is located on theinterior of 'the first or innermost dished member and is rotated in an opposite direction to the said member. 7

Inaddition to the foregoing principal ar-' rangement, the invention comprises certain other arrangements which are preferably employed at the same time and which will be described more fully hereafter. T

Amongst these may be mentioned the folf- .termed the regulating hopper. f? is'an lowing A supplementary mechanism or apparatus throu h which thetair and pulverizedmaterials issuing from the pulverizing machine are passed. This apparatus comprises a telescopic tube from theextremity of which the products reduced to the desired-degree of fineness determined by the height .of the said tube are collected. These products which are as just mentioned of a greater or lesser degree of fineness fall into a'collecting device, whilst those which are too heavy 'fall back before reaching the end of the tube and are taken back tobe retreated.

According to a further arrangement the -machine is provided with a double jacket or casing and a fluid at an appropriate tem-- perature which varies according to the products to be pulverized is caused to circulate through the jacket or casin The invention also inclu les certain constructional embodiments which will'now be described with reference to the accom anying drawings, but it is to be understoo that vstructed according to a first method of carthe description and drawings are given merely by way of example. Fig.1 of the drawings shows in vertical axial section a pulverizing machine conand a third method of carrying out the invention.

Fig.4 shows in diagrammatic sectional elevation a pulverizing machine provided with means for separating the product ac cording to fineness. y

Thepulveri'zing machine and associatedapparatus accordin to the invention is constructed substantial y as follows a is a rotary beater provided with blades and forming a ventilator or fan, mounted at V the end of a shaft 6.

. c is a-concave or dished member embrac-.- ing the beater a and also mounted at the end of a shaft d, which shaft is in alignment with the shaft 6 and adapted to turn in the op o site direction thereto. The dished "me'm r is rovided on the interior and on the extenor with radial vanes 0 so that it forms a centrifugal ventilator or fan. I f is a casing containing the whole mechanism and provided with a charging hopper f is another hopper which may be exit orifice which may open radially with respect to "the member a or may be tangential thereto. The casing f maybe formed with double walls so hat a fluid circulation at a temperature appropriateto the nature and condition of the materialbeing treated can .be passed therethrou h. It may have on the interior a ohanne ed surface which may be formed from a cylindrical plateg held in position in rooves f? in the casing.

The vanes or bla es of the beater and of the dished or hollow member may be so formed, as also the dished member itself,

that the conditions are the. most suitable for the material to be'treated.

For instance the construction illustrated at Fig. 1 isone suitable for heavy and dry materials. The construction shown at Fig. 2 is for light and dr material's; whilst the construction indicate atFig. 3 is' for damp materials.

The machine is provided'with means for collecting the pulverized products when reduced to the desired degree of fineness, and for returning to thesaid machine for further treatment those fragments which have not been reduced to the desired degree of fineness.- I

The apparatus in question is preferably constructed as follows k is a chamber mounted above the exit orifice f of the machine and provided with a conduit h communicating with the regulating hopper f. It is also provided with an inner lip or baffle k which is formed from an inclined plate. The conduit 10. is provided with apivoted flap h which is kept normally closed by an adjustable counterbalance weight, but which opens under the weight of material accumulating above it.

A system of telescoping tubes is also provided located above the chamber h. This system may comprise for instance two or more tubes such as i, i which are adapted to slide or telescope into one another, the action being controlled by sultable mechanism, as for instance by a rack j and a pinion in connection with a handle k.

:l is a reservoir. or receptacle provided with means at the bottom for facilitating the'distribution of the pulverized products. Into the upper portion of the said reservoir or receptacle opens the telescoping system of tubes. The reservoir communicates by a conduit m with the hopper f, with the interposition of a regulating flap or shutter n by means of which the section for the passage of air can be varied at will. The conduit on may comprise at any desired point, for instance at the-highest point, means for admitting, additional air.

By the foregoing construction an apparatus is produced, which functions in the following manner ,The material to be pulverized isfed through the hopper f. The shafts b and d are rotated in opposite directions. The fragments tobe disintegrated are carried along by the current of air produced by the l ades a and they are thrown against the dished member'c. They are caught up .by the current of air produced by the vanes e and are thrown against the channelled wall 9. They are broken up into smaller pieces by reason of these successive impacts and are finally drawn away by the current of air escaping through the orifice f.

By reason of the circulation of a hot or cold fluid throughi the double walls of the casing, where such. circulation isprovided,

the materials may be treated in a special manner and may be exposed to a temperature which is the. most favourable for their I disintegration.

The fragments-which have been reduced to a sufficiently fine state are carried along by the current of air to the reservoir, no

horizontal passages being present which would be undesirable and'lead to the deposit of the material.

The heavier material which is still larger than required falls back down the tubes 2" and 2' and being intercepted by the lip 12. passes to the regulating hopper f after causing the flap 71. to tilt. The air returns to the same hopper-through the conduit m,

through the regulating shutter n which en- As will be clearly understood, and as has already been. stated, the invention is not limited in any way to the. constructional embodiments or to the arrangements which have been more fully described. It includes all modifications coming within a fair, interpretation of the claims.

What we claim and desire to secure by Letters Patent of the United States of America is 1. In a pulverizing machine, the combination of a caslng, having an inlet opening and an outlet opening, two shafts in alignment adapted to be driven in opposite directions and passing through bearings into the said casing, a 'beater provided with.

blades mounted on the end of one of the said shafts and within the said casing, and a dished member adapted partly to embrace the said beater and provided with radial vanes mounted opposite to the said beater and on the end of the other shaft within the casing, said dished member having an" annular projection extending over the blades of the said beater.

2. A pulverizing machine according to claim 1 having vanes mounted upon the said annular projection thereof, the said vanes being adapted to cause a centrifugal movement of the air in the casing when the said machine is operated.

3. A pulverizing machine according to claim 1 in which the said dished member.

has vanes mounted upon the said annular projection and also has vanes mounted interior to said annular projection whereby the said interior and exterior vanes impart a centrifugal movement to the air in the said casing when the said machine is op erated.-

In testimony whereof we have hereunto set our hands.

EDMOND CHARTON. PIERRE MAURICE MONGEREAU. 

